Hunter S. Thompson, an American journalist and author, who founded the gonzo journalism movement and internationally known with the publication of Hell’s Angels once said: “Paranoia is just another word for ignorance” and “There is no such thing as paranoia. Your worst fears can come true at any moment”.
When it comes to sexually transmitted infection, many men (and women) would have the paranoia of catching infection at some point of their lives, having the “ignorance” of not using the protection. Indeed, the onset of the infection would not be a “paranoia” but a definite “the worst fears that will come true” at some point.